Heating-drum.



No. 705,92l. Patented July 29, |902.

E. GRAHAM. y f 'HEATING DRUM.

(Application led Dec. 31, 1901.)

(N0 Model.)

'UNITED STATES PATENT OFFICE.

EUPHEMIA GRAHAM, OF CARROLL, IOWA.

HEATING-DRUM.

SPECIFICATION formngpart Of Letters Patent N0. 705,921, dated July 29, 19,02.

Application tiled December 31,1901. Serial No. 87,918. (No model.)

To all?, zuil/0m, it may concern:

Beit known that LE UPHEMIA GRAHAM,a citi# zen of the United States, residing at Carroll, inthe county o f Carroll and State of Iowa,` have invented certain new and useful Improvements in Heating-Drums; and I do de'- clare the following to be a full,- clear, and exact description of the invention, such as will enable others skilled in the art to which it' appertains to make and use the same.

The invention relates to .heating-drums, and more particularly to that class of devices lused in connection with gasand gasolene stoves. Y

The object of the invention is to provide av heating-drum which shall be simple lof 'construction, durable in use, comparatively in- 1expensive of production, and efficient in acl' ion.

With this and other objects in view the invention consists of certain novel features of construction, combination, and arrange-V ment of parts, which will be hereinafter more fully described and particularly pointed out in the appended claims.

In the accompanying drawings, Figure lis a side elevation of my improved heating-drum.v Fig. 2 isalongitudinal vertical sectional View, and Fig. 3 is a horizontal sectional view.

Referring to the drawings, l denotes the heating-drum, consisting of the inner and outer shells 2 and 3, respectively, the former of which is arranged within the llatter and spaced apart and closed at its lower end and formed with a point 4, which serves as a spreader or deiiector. The outer shell at its lower end is provided with an aperture 5 directly below the pointedlower end of the inner shell, an-d both shells are connected at their upper ends by a ring 6,'thus forming between the two shells a hot-air chamber from' which the air cannot escape except by backing out through the opening `5,**which is of course placed over the burner of the stove.

7 denotes a series of pipes which lead from the outer shell acrossthe hot-air chamber and through the inner shell. These tubes are connected to the inner and outer shells in any suitable manner, so as to form an airtight joint at the points of connection, and

. are preferably conical, the lower ends being of a greater diameter than the upper ends.

In use when placed over the ame ot' a burner the heat passes up into the chamber and notbeing able to escape at the upper end thereof intensely heats the'tubes '7, through which cold air passes upwardly into the outer shell, which is also heated by the air confined Within the hot-air chamber. Thus the air escaping through the upper open end of the inner shell becomes heated to ahigh degree of temperature, not only by passing through the tubes 7, but. also by receiving heat from the inner wall of the inner shell. ItWill also be noticed that the outer shell will become heated to a high degree of temperature by reason of the heated air being confined within the same and thatV this shell will radiate heat from its sides.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation, and advantages of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

Having thus described my invention, what I claim, `and desire to secure by Letters Patent, is-

l. A heating-drum consisting of concentric shells spaced apart, the outer shell being provided With an aperture at its lower end, and the inner shell being closed at its lower end and arranged immediately above said aper-V ture, the upper ends of both of said shells being connected together by a ring to close the upper end of the chamber formed by the two shells, and open-ended tubes extending through said chamber and connected to said shells, substantially as set forth.

2. A heating-drum consisting of concentric shells spaced apart, the outer shell being provided With an aperture atV its, lower end andthe inner shell having a closed conical lower end which is arranged immediately above said aperture, the upper ends of both of said shells IOO louter to their inner ends at which latter point being connected together by a ring which In testimony whereof I have hereunto set closes the upper end of the chamber formed my hand in presence of two subscribing witro by the two shells, and open-ended tubes eX- i messes. tending through said chamber and connected to said shells, said tubes tapering from their EUPHEMIA GRAHAM Witnesses:

J. E. GRIFFITH,

they me the smallest, substantially as set HELEN M. ALLEN. 

